Winemaker Renato Ratti recently opened to the public his family’s 18th-century, 13-room villa in the Piedmont countryside. An old cellar stores decades’ worth of Ratti wines. Guided tastings can be arranged upon request, and bottles can be shipped...

Off the coast of Costa Rica’s remote Osa Peninsula, spend your days at sea counting humpback whales, identifying them by their markings, plotting their movements, and recording their sounds. Your work will help to determine if the same whales...